CN210715688U

CN210715688U - Tensioner

Info

Publication number: CN210715688U
Application number: CN201920956415.4U
Authority: CN
Inventors: 林其深; 郭必成; 张丽彬; 李杨青; 赖伟通; 姜峰
Original assignee: Huaqiao University
Current assignee: Huaqiao University
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-06-09
Anticipated expiration: 2029-06-24

Abstract

The utility model discloses a tensioner, which comprises a fixed part, a pin shaft, a coil spring, a grooved pulley and a working wire; the pin shaft can be rotatably connected to the fixed part; the spring is provided with a fixed end and a free end, the fixed end of the spring is fixedly connected with the fixed part, and the free end of the spring is connected with the pin shaft together to enable the rotation of the pin shaft to be corresponding to the retraction of the spring; the grooved pulley is fixedly connected with the pin shaft, the working wire is wound and connected to the grooved pulley, the tail end of the working wire extends out of the fixing part, and the movement of the working wire and the rotation of the grooved pulley form linkage. It has the following advantages: when the spring works, the coil spring generates deformation torque through the operation of the working wire, one end connected with the pin shaft generates restoring force under the action of the torque to drive the pin shaft to rotate, and the rotation of the pin shaft drives the connected grooved wheel to rotate, so that the working wire wound on the grooved wheel can be tensioned.

Description

Tensioner

Technical Field

The utility model relates to the technical field of mechanical equipment, especially, relate to a tensioning ware.

Background

The coil spring belongs to a spiral spring, can store and release angular energy, and is widely applied to the industries of computers, electronics, household appliances, instruments, harvesters, automobiles and the like because of having the functions of controlling the movement of parts, buffering impact or vibration, storing energy, measuring the force and the like. However, the existing coil spring tensioner has the following disadvantages in the use process: the connection is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model provides a tensioner, it has overcome among the background art not enough that wind spring tensioner exists.

The utility model provides an adopted technical scheme of its technical problem is:

a tensioner comprises a fixed part, a pin shaft, a coil spring, a grooved pulley and a working wire; the pin shaft can be rotatably connected to the fixed part; the spring is provided with a fixed end and a free end, the fixed end of the spring is fixedly connected with the fixed part, and the free end of the spring is connected with the pin shaft together to enable the rotation of the pin shaft to be corresponding to the retraction of the spring; the grooved pulley is fixedly connected with the pin shaft, the working wire is wound and connected to the grooved pulley, the tail end of the working wire extends out of the fixing part, and the movement of the working wire and the rotation of the grooved pulley form linkage.

In one embodiment: the fixed part comprises a bracket and a shell; the shell and the bracket are fixedly connected together and form a mounting cavity, and the coil spring is arranged in the mounting cavity; the shell is provided with a center hole penetrating through the mounting cavity, and the pin shaft can be rotatably connected to the center hole of the shell and is provided with a first end part positioned in the mounting cavity and a second end part positioned outside the shell; the first end part of the pin shaft is connected with the free end of the coil spring, and the grooved wheel is fixedly connected with the second end part of the pin shaft.

In one embodiment: the inner end of the coil spring forms the free end, and the outer end of the coil spring forms the fixed end.

In one embodiment: and a rolling bearing is arranged between the pin shaft and the central hole of the shell.

In one embodiment: the first end of the pin shaft is concavely provided with a slit which penetrates in the radial direction, the free end of the coil spring forms an insertion sheet, and the insertion sheet is inserted into the slit at the first end of the pin shaft.

In one embodiment: the fixed end of the coil spring is of a U-shaped structure and comprises two side plates and a middle plate fixedly connected with the two side plates; the shell is provided with an annular periphery contacting the support, the annular periphery is concavely provided with two through grooves penetrating through the inside and the outside, and the two through grooves are respectively connected through the two side plates, the middle plate is abutted against the outer wall of the shell to fixedly connect the fixed end of the coil spring with the fixed part together.

In one embodiment: the fixed part also comprises a shell cover, the shell is provided with an outer end face back to the support, the outer end face of the shell is concavely provided with an assembly groove, the assembly groove is provided with a notch penetrating through the inside and the outside, and the bottom of the assembly groove is concavely provided with the central hole; the shell cover is fixedly connected to the outer end face of the shell and covers the notch of the assembling groove; the grooved wheel is positioned in the assembly groove, and the tail end of the working wire penetrates through the notch and extends out of the assembly groove.

Compared with the background technology, the technical scheme has the following advantages:

when the spring works, the coil spring generates deformation torque through the operation of the working wire, one end connected with the pin shaft generates restoring force under the action of the torque to drive the pin shaft to rotate, and the rotation of the pin shaft drives the connected grooved wheel to rotate, so that the working wire wound on the grooved wheel can be tensioned.

Drawings

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

FIG. 1 is a schematic perspective view of an embodiment tensioner;

fig. 2 is an exploded perspective view of an embodiment tensioner.

Detailed Description

Referring to fig. 1, a tensioner includes a fixed portion, a pin 7, a coil spring 3, a sheave 8, and a working wire 12.

The fixing portion includes a bracket 1, a housing 5, and a housing cover 10. The housing 5 and the bracket 1 are fixedly connected together, and a mounting cavity is formed between the housing 5 and the bracket 1, for example, the housing 5 and the bracket 1 are fixedly connected together through screws 2 and 4. The outer shell 5 is provided with an outer end face back to the support 1, an assembling groove 51 is concavely arranged on the outer end face of the outer shell 5, a notch 52 penetrating through the inner part and the outer part is arranged at the assembling groove 51, and a central hole 53 penetrating through the assembling groove 51 to the mounting cavity is concavely arranged at the bottom of the assembling groove. The housing cover 10 is fixed to the outer end surface of the housing 5 and covers the notch of the fitting groove 51, and the housing cover 10 is fixed to the housing 5 by, for example, screws 9 and 11.

The pin 7 can be rotatably connected to the central hole 53 of the housing 5 and has a first end portion located in the mounting cavity and a second end portion located outside the housing 5, so that the pin 7 can be rotatably connected to the fixed portion; furthermore, a rolling bearing 6 is arranged between the pin shaft 7 and the central hole 53 of the shell 5 to reduce friction force and ensure smoother rotation.

The coil spring 3 is provided with a fixed end and a free end, the fixed end of the coil spring 3 is fixedly connected with the fixed part, and the free end of the coil spring 3 is connected with the first end part of the pin shaft 7, so that the rotation of the pin shaft 7 and the retraction of the coil spring 3 are corresponding. In the concrete structure: 1. the inner end of the coil spring forms the free end, and the outer end of the coil spring forms the fixed end; 2. the fixed end of the coil spring 3 is rigidly connected with the bracket 1, and the fixed end of the coil spring 3 is in a U-shaped structure 31 and comprises two side plates and a middle plate fixedly connected with the two side plates; the shell 5 is provided with an annular periphery contacting the bracket, the annular periphery is concavely provided with two through grooves 54 penetrating through the inside and the outside, two through grooves are respectively connected through two side plates, and the middle plate is abutted against the outer wall of the shell to fixedly connect the fixed end and the fixed part of the coil spring together, so that the coil spring 3 is arranged in the installation cavity; 3. a cutting slit 71 which penetrates through the first end of the pin shaft 7 in the radial direction is concavely arranged at the first end of the pin shaft, and the free end of the coil spring forms an insertion sheet which is inserted into the cutting slit at the first end of the pin shaft. Through the structure, the end face of the coil spring is ensured to be connected to the bracket, and the coil spring is ensured not to be twisted.

The grooved pulley 8 is fixedly connected to the second end of the pin shaft 7, the grooved pulley 8 is located in an assembly groove 51 of the housing 5, the working wire 12 is wound and connected to the grooved pulley 8, so that the movement of the working wire 12 and the rotation of the grooved pulley 8 form linkage, namely the working wire 12 is pulled to drive the grooved pulley 8 to rotate, the grooved pulley 8 rotates to drive the working wire 12 to take up, and the tail end of the working wire 12 passes through the notch 52 and extends out of the assembly groove 51, so that the grooved pulley and the working wire are ensured to be on the same plane. The pin shaft is connected with the grooved wheel through a bolt for example.

In this embodiment: the shell 5 is formed by 3D printing or metal processing of nylon, so that sufficient strength is ensured; the width of the coil spring 3 is less than or equal to 20mm, so that the thickness of the whole device is small; the track axial runout of the working wire 12 is less than 0.1 mm.

The tensioning method of the tensioner of the present embodiment includes: the working wire wound on the grooved pulley 8 is driven by a working power source to move, and in the wire moving process, the movement of the working wire drives the wound grooved pulley 8 and the pin shaft 7 connected with the same to synchronously move; when the grooved pulley 8 and the pin shaft 7 synchronously move, the coil spring 3 is connected with the pin shaft 7, so that the coil spring 3 deforms along with the movement of the pin shaft 7, and at the moment, the coil spring 3 generates deformation torque due to elastic deformation; the moment that coil spring 3 produced provides the restoring force to the working silk, and the restoring force that provides at coil spring 3 alright take up the working silk, prevents that the working silk from taking place laxly in the course of the work.

The tensioner can be changed to different parameters of the wrap spring as needed to provide different tensioning forces. The tensioner can adopt a coil spring with the thickness not more than 20mm, when the working wire runs, the coil spring generates certain angular deformation, the moment generated by the deformation generates certain restoring force to the coil spring in a certain space, and the tensioning of the tensioner on the working wire can be realized by utilizing the elastic characteristic of the coil spring. The working wire may be a diamond wire saw, a metal wire, or the like.

The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.

Claims

1. A tensioner, characterized by: the device comprises a fixed part, a pin shaft, a coil spring, a grooved pulley and a working wire; the pin shaft can be rotatably connected to the fixed part; the spring is provided with a fixed end and a free end, the fixed end of the spring is fixedly connected with the fixed part, and the free end of the spring is connected with the pin shaft together to enable the rotation of the pin shaft to be corresponding to the retraction of the spring; the grooved pulley is fixedly connected with the pin shaft, the working wire is wound and connected to the grooved pulley, the tail end of the working wire extends out of the fixing part, and the movement of the working wire and the rotation of the grooved pulley form linkage.

2. A tensioner as claimed in claim 1, wherein: the fixed part comprises a bracket and a shell; the shell and the bracket are fixedly connected together and form a mounting cavity, and the coil spring is arranged in the mounting cavity; the shell is provided with a center hole penetrating through the mounting cavity, and the pin shaft can be rotatably connected to the center hole of the shell and is provided with a first end part positioned in the mounting cavity and a second end part positioned outside the shell; the first end part of the pin shaft is connected with the free end of the coil spring, and the grooved wheel is fixedly connected with the second end part of the pin shaft.

3. A tensioner as claimed in claim 2, wherein: the inner end of the coil spring forms the free end, and the outer end of the coil spring forms the fixed end.

4. A tensioner as claimed in claim 2, wherein: and a rolling bearing is arranged between the pin shaft and the central hole of the shell.

5. A tensioner as claimed in claim 2, wherein: the first end of the pin shaft is concavely provided with a slit which penetrates in the radial direction, the free end of the coil spring forms an insertion sheet, and the insertion sheet is inserted into the slit at the first end of the pin shaft.

6. A tensioner as claimed in claim 2, wherein: the fixed end of the coil spring is of a U-shaped structure and comprises two side plates and a middle plate fixedly connected with the two side plates; the shell is provided with an annular periphery contacting the support, the annular periphery is concavely provided with two through grooves penetrating through the inside and the outside, and the two through grooves are respectively connected through the two side plates, the middle plate is abutted against the outer wall of the shell to fixedly connect the fixed end of the coil spring with the fixed part together.

7. A tensioner as claimed in any one of claims 2 to 6, wherein: the fixed part also comprises a shell cover, the shell is provided with an outer end face back to the support, the outer end face of the shell is concavely provided with an assembly groove, the assembly groove is provided with a notch penetrating through the inside and the outside, and the bottom of the assembly groove is concavely provided with the central hole; the shell cover is fixedly connected to the outer end face of the shell and covers the notch of the assembling groove; the grooved wheel is positioned in the assembly groove, and the tail end of the working wire penetrates through the notch and extends out of the assembly groove.